diff -r 5d5701bed047 -r 6299566d00bc src/Pure/Admin/build_release.scala
--- a/src/Pure/Admin/build_release.scala	Fri Oct 14 19:42:54 2016 +0200
+++ b/src/Pure/Admin/build_release.scala	Fri Oct 14 19:49:38 2016 +0200
@@ -75,9 +75,10 @@
 
     for ((platform_family, platform_bundle) <- platform_bundles) {
       val bundle_archive =
-        Path.explode(
-          (if (remote_mac.isEmpty) fallback_platform_bundles.toMap.get(platform_family) else None)
-            getOrElse platform_bundle)
+        release_info.dist_dir +
+          Path.explode(
+            (if (remote_mac.isEmpty) fallback_platform_bundles.toMap.get(platform_family) else None)
+              getOrElse platform_bundle)
       if (bundle_archive.is_file)
         progress.echo("### Application bundle already exists: " + bundle_archive.implode)
       else {